943997 has 4 divisors (see below), whose sum is σ = 948156. Its totient is φ = 939840.

The previous prime is 943967. The next prime is 944003. The reversal of 943997 is 799349.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 799349 = 19 ⋅42071.

It can be written as a sum of positive squares in 2 ways, for example, as 737881 + 206116 = 859^2 + 454^2 .

It is a cyclic number.

It is not a de Polignac number, because 943997 - 2⁸ = 943741 is a prime.

It is a super-2 number, since 2×943997² = 1782260672018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (943967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1718 + ... + 2199.

It is an arithmetic number, because the mean of its divisors is an integer number (237039).

2⁹⁴³⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

943997 is a deficient number, since it is larger than the sum of its proper divisors (4159).

943997 is a wasteful number, since it uses less digits than its factorization.

943997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4158.

The product of its digits is 61236, while the sum is 41.

The square root of 943997 is about 971.5950802675. The cubic root of 943997 is about 98.0972587137.

The spelling of 943997 in words is "nine hundred forty-three thousand, nine hundred ninety-seven".